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gallivm: use getHostCPUFeatures on x86/llvm-4.0+.

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Use llvm provided API based on cpuid rather than our own
manually mantained list of mattr enabling/disabling.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
Tim Rowley 2016-10-31 10:29:07 -05:00
parent 48416b6f4d
commit b035d9cab5
1 changed files with 15 additions and 0 deletions
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15
src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
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@ -542,6 +542,20 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
llvm::SmallVector<std::string, 16> MAttrs; llvm::SmallVector<std::string, 16> MAttrs;
#if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64) #if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
#if HAVE_LLVM >= 0x0400
/* llvm-3.7+ implements sys::getHostCPUFeatures for x86,
* which allows us to enable/disable code generation based
* on the results of cpuid.
*/
llvm::StringMap<bool> features;
llvm::sys::getHostCPUFeatures(features);
for (StringMapIterator<bool> f = features.begin();
f != features.end();
++f) {
MAttrs.push_back(((*f).second ? "+" : "-") + (*f).first().str());
}
#else
/* /*
* We need to unset attributes because sometimes LLVM mistakenly assumes * We need to unset attributes because sometimes LLVM mistakenly assumes
* certain features are present given the processor name. * certain features are present given the processor name.
@ -596,6 +610,7 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
MAttrs.push_back("-avx512vl"); MAttrs.push_back("-avx512vl");
#endif #endif
#endif #endif
#endif
#if defined(PIPE_ARCH_PPC) #if defined(PIPE_ARCH_PPC)
MAttrs.push_back(util_cpu_caps.has_altivec ? "+altivec" : "-altivec"); MAttrs.push_back(util_cpu_caps.has_altivec ? "+altivec" : "-altivec");